Did you know that you can set GoldMine to "auto-select" the contents of a field when you click into it? Think of it like this; when you click into the Address bar of Internet Explorer or Firefox, the contents are automatically selected (highlighted), making it east to overwrite whatever is there by simply typing. It also makes it easy to Copy the contents of the field by simply hitting CTRL-C (the default Windows Copy command).
To set this up:
1. Select Tools | Options from the top level menu
2. Select the "Record" Tab
3. Check the box labeled "Select Contents of Fields"
You will need to log back into GoldMine when prompted to affect the change. Try it!